大牛地气田气井乳化物防治措施研究

Research on the Prevention and Control Measures of Emulsions in Gas Wells of Daniudi Gas Field

摘要: 泡沫排水采气工艺是大牛地气田排水采气的重要工艺，因大牛地气田气井产出液普遍含凝析油，导致泡排工艺效果差井筒加注的泡排剂极易与凝析油反应形成乳化物，不仅导致泡排工艺效果差且造成井内乳化难以排出，导致气井生产异常。本文针对乳化物的形成机理，通过开展室内试验及现场分析，开展研究温度、凝析油、泡排剂、甲醇等因素对气井乳化物生成的影响、研究，针对乳化物导致气井积液稳产复产较难的问题，根据不同的工况条件，通过优化合理甲醇及泡排剂加注量，建立满足高含凝析油气井泡排治理方法，形成适应大牛地气田高含凝析油气井的稳产复产方法。

Abstract: The foam drainage gas production process is an important process for drainage gas production in Daniudi gas field. Because the produced fluid of Daniudi gas field gas wells generally contains condensate, the effect of foam drainage process is poor, the foam drainage agent injected in the wellbore is very easy to react with condensate to form emulsion, which not only leads to poor effect of foam drainage process, but also makes it difficult to discharge emulsification in the well, leading to abnormal gas well production. This article focuses on the formation mechanism of emulsions, and conducts indoor experiments and on-site analysis to study the effects of factors such as temperature, condensate oil, foaming agent, methanol, etc., on the generation of emulsions in gas wells. In response to the difficulty of stable production and recovery caused by emulsions in gas wells due to liquid accumulation, a method for treating bubbles in high condensate oil and gas wells is established by optimizing the reasonable amount of methanol and foaming agent injection according to different working conditions, and a stable production and recovery method suitable for high condensate oil and gas wells in the Daniudi gas field is formed.